Clean beam patterns with low crosstalk using 850 GHz microwave kinetic inductance detectors

Yates, S. J. C., Baselmans, J. J. A., Baryshev, A. M., Doyle, Simon ORCID: https://orcid.org/0000-0002-9054-986X, Endo, A., Ferrari, L., Hochgürtel, S. and Klein, B. 2014. Clean beam patterns with low crosstalk using 850 GHz microwave kinetic inductance detectors. Journal of Low Temperature Physics 176 (5-6) , pp. 761-766. 10.1007/s10909-013-1034-z

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Abstract

We present modeling of distributed λ /4 microwave kinetic inductance detectors (MKIDs) showing how electromagnetic cross coupling between the MKID resonators can occur at frequencies corresponding to the microwave readout signal (∼ 4–8 GHz). We then show system beam pattern measurements in the reimaged focal plane of a 72 detector array of lens–antenna coupled MKIDs at 850 GHz, which enables a direct measure of any residual optical crosstalk. With use of transmission line bridges we see no residual cross coupling between MKIDs and hence low crosstalk down to the − 30 dB level, with near Gaussian shape (limited by reimaging optics) to − 10 dB level.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Springer
ISSN:	0022-2291
Date of Acceptance:	15 December 2013
Last Modified:	31 Oct 2022 08:56
URI:	https://orca.cardiff.ac.uk/id/eprint/79280

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